Calabi–Yau rational curve conjecture in dimension m

Let $X$ be an $m$-dimensional simply connected nonsingular projective variety with trivial canonical line bundle, so $X$ is a Calabi–Yau manifold.

Calabi–Yau rational curve conjecture in dimension $m$. The variety $X$ should contain a rational curve.

This is a classical conjecture about rational curves on Calabi–Yau manifolds and is used in the paper alongside abundance-type conjectures. No resolution status is supplied in the source.